Anna Kournikova viciously brawls with another woman in a Vegas club, Leighton Meester sings and acts in a video for Cobra Starship, Michael Jackson looked frail on stage at his concert rehearsals and Chris Brown gets shut down by Jay-Z.

Tennis star and lover of Enrique Iglesias Anna Kournikova got into a fight Saturday night at a club in Vegas after some random woman threw a drink at her for "invading her space." [Page Six]

Leighton Meester sings and acts in a new Gossip Girl-y video she stars in for Cobra Starship's song "Good Girls Go Bad." And yes, the song was written and the video was shot prior to the news that Meester's talented feet were the star of a new celebrity sex tape to hit the internet. [Daily Intel]

Michael Jackson looked frail but appeared to be getting his groove on in these photos taken during a rehearsal at the Staples Center shortly before his death. [Daily Mail]

Chris Brown was supposed to take part in a Michael Jackson tribute at the BET Awards on Sunday night, but Jay-Z stepped in and torpedoed those plans. [Page Six]

Alice Hoffman isn't just attacking people who offend her delicate sensibilities on Twitter—She recently attacked a blogger who was moderating a discussion about her new book at a Barnes and Noble store. [Page Six]

Actress Emma Watson of Harry Potter fame is moving to New York to attend school at Columbia, where perhaps she can follow in the footsteps of her fellow thespian James Franco and sleep her way to a degree. [Daily News]

Jude Law, currently starring in a London production of Hamlet, strolls through the streets of the city coolly sipping on frappucinos. [Just Jared]

Sacha Baron Cohen got a taste of his own medicine last night when a Bruno imposter showed up at the movie's Australian premiere in a pink stretch Hummer filled with a bevy of scantily clad dancers. [Daily Mail]

Sarah Jessica Parker and Matthew Broderick have released the first photos of their new twin girls, who were recently delivered by a surrogate mother in Ohio. [Daily Mail]

Mariah Carey got done up as an Eminem-type rapper for her new video for her song "Obsessed." We can't wait for Eminem to respond with a video in which he dresses up like a hideous-looking Mariah Carey, because you just know he's going to do it. [DListed]

Lady GaGa claims that she's been doing volunteer charity work since she was two years old. [UK Sun]